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math.CO2025
The Rainbow Arborescence Problem on Cycles
Kristóf Bérczi, Tamás Király, Yutaro Yamaguchi +1
The rainbow arborescence conjecture posits that if the arcs of a directed graph with vertices are colored by colors such that each color class forms a spanning arborescen…
math.CO2025
A note on embracing exchange sequences in oriented matroids
Kristóf Bérczi, Benedek Nádor
An open problem in convex geometry asks whether two simplices , both containing the origin in their convex hulls, admit a polynomial-length sequence of ve…